Nor do I, I simply offered it as a statement of fact. It's happened to many over the years and will continue to happen; holding unpopular views has always had consequences for individuals and organizations.
Will this marginalize the BSA out of existence; probably but it will take a long time. I'm actually amused by the possibility of a BSA-like organization that had was open to people of all sexual preferences; it would be interesting to chart it's popularity and growth and see if x number of people leaving BSA equaled y people joining the open organization.
It is fact.
When it comes to religious people, this is how they can differentiate themselves from others - not rollin' with the trends, so to speak.
If a religious organization, or any organization which holds to Biblical teaching, depends on public and societal acceptance for it to have sustenance, it probably isn't a true organization anyway, and it's more than likely a weak one.
Outsiders will recognize the strengths and weaknesses of an organization based on it's members, and judge accordingly. I would venture to say that the stronger an organization, the less outside opinion matters, and the weaker, the more outside opinions matter.